Caveat, I haven't played O8 yet...

Hand 4 - I easily bet this river at micro stakes. Any 2 pair, and probably AKxx is calling. They're too chicken shit to bet and I don't want them seeing my hand if I can help it (i.e. they fold crap is fine with me).

If villain has shown any tendency to bet into weakness I would check/call. Is this too holdem?

Hand 5 - This seems thinner but ok. I would expect to get raised here (and fold), where in hand 4 I would expect a fold.